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Automatic point source transmittance stray light testing system and method

A point source transmittance and testing method technology, applied in the field of stray light testing, can solve the problems of low measurement accuracy and low efficiency, and achieve the effect of reducing operation difficulty, reducing human intervention, and measuring high-precision point source transmittance

Active Publication Date: 2020-05-12
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to solve the problem of low measurement accuracy and low efficiency in measuring point source transmittance by manual operation test system, thereby providing an automated point source transmittance stray light test system and method

Method used

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  • Automatic point source transmittance stray light testing system and method
  • Automatic point source transmittance stray light testing system and method
  • Automatic point source transmittance stray light testing system and method

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specific Embodiment approach 1

[0036] Specific implementation mode one: combine figure 1 with figure 2 Describe this embodiment in detail, the automated point source transmittance stray light test system described in this embodiment includes a pulsed laser 1, a beam shaper 2, a collimator 3, a first detection system 4, a translation mechanism 5, and a rotary table 6. The second detection system 7, the signal acquisition system 8, the computer 9 and the darkroom 10;

[0037] The laser light emitted by the pulse laser 1 is reshaped by the beam shaper 2 and then incident on the collimator 3. The laser beam is collimated by the collimator 3 and then incident on the optical system 11 to be tested on the rotary table 6; the components of the optical system 11 to be tested are The reflection, refraction, scattering or diffraction of the mechanical structure reaches the focal plane of the optical system 11 to be tested;

[0038] The first detection system 4 is located at the entrance pupil of the optical system ...

specific Embodiment approach 2

[0047] Embodiment 2: The automated point source transmittance stray light test method described in this embodiment is implemented based on the automated point source transmittance stray light test system described in Embodiment 1. The method includes the following steps:

[0048] Step 1. Turn on the pulse laser 1 and wait for the pulse laser 1 to stabilize;

[0049] Step 2, positioning the optical system 11 to be tested so that the parallel light emitted by the collimator 3 fills the entrance of the optical system 11 to be tested, and the center of the optical system 11 to be tested is located at the rotation center of the rotary table 6;

[0050] Step 3, the first detection system 4 measures the irradiance at the entrance pupil of the optical system 11 to be measured, and the signal acquisition system 8 collects the measurement results;

[0051] Step 4, the computer 9 controls the translation mechanism 5 to move the first detection system 4 away until the laser emitted by the...

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Abstract

An automatic point source transmittance stray light test system and method relate to the stray light test technology field. When a manual operation test system is adopted to measure point source transmittance, measurement precision is low and efficiency is low too. In order to solve the above problems, the invention discloses the automatic point source transmittance stray light test system and method. A laser emitted by a pulse laser is shaped by a light beam shaping device and then is emitted into a collimator. The laser is collimated by the collimator and then is emitted to an optical systemto be tested on a rotation table. A first detection system is located at the entrance pupil of the optical system to be tested and is fixed to a translation mechanism. A second detection system is located on the focal plane of the optical system to be tested and is located on the rotation table. The first detection system and the second detection system are used for measuring irradiance. A signalacquisition system collects a measurement result and sends the measurement result to a computer. The computer is used for receiving the measurement result and calculating the point source transmittance and is also used for making the translation mechanism, the rotation table and the signal acquisition system realize the automation measurement of the point source transmittance. The system and themethod are suitable for testing the point source transmittance.

Description

technical field [0001] The invention relates to the technical field of stray light testing. Background technique [0002] Stray light refers to the non-imaging light beam that reaches the image plane of the optical system and forms background noise on the detection element. The existence of stray light affects the imaging quality of the optical system, reduces the contrast of the target, and in severe cases, the optical system cannot work normally. [0003] The causes of stray light in optical systems are intricate, not only related to manufacturing processes and materials, but also related to diffraction phenomena, target characteristics, and background special effects. At present, there are mainly two methods for measuring stray light, namely, the black spot method and the point source method. The black spot method device is difficult to implement and has low accuracy. The point source method has high precision and is in line with the development trend of space optics t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01M11/00
CPCG01M11/00
Inventor 汪洪源刘祥康文颜志强王秉文郭雨桐武少冲
Owner HARBIN INST OF TECH